| U.S. Highways of the Montana Highway System | |
|---|---|
   Highway markers for U.S. Highway 2, 12, and 191 | |
 Map of main highways (Interstate and U.S.) | |
| System information | |
| Maintained by MDT | |
| Highway names | |
| Interstates | Interstate n (I-n) |
| US Highways | U.S. Highway n (US n) |
| State | Montana Highway n (MT n) |
| Secondary: | Secondary Highway n (S-n) |
| System links | |
The U.S. Highways in Montana are the segments of the United States Numbered Highway System owned and maintained by the Montana Department of Transportation (MDT) in the U.S. state of Montana.